Swivel



R. TAYLOR Feb. 15,1927f s wIvEL Filed Oct. 12, 1925 Patented Feb. 15,1927.

UNITED STATES Y 1,617,776 PATENT OFFICE.

ROY TAYLOR, OF LOS ANGELES, CALIFORNIA, ASSEGNOR O1?- ONE-HALF TO DAVIDA.

. CANT, OF LOS ANGELES, CALIFORNIA.

SWIVEL.

Application led October 12, 1925.

swivel for use in connection with well drilling rigs and it is a generalobject of this invention to provide a simple, effective and improveddevice of this character.

It is an object of this invention to provide an effective, improvedpacking means for the wash pipe of a swivel.

Another object of this invention is to provide a simple and improvedarrangement of packing means in a swivel.

It is a further object of this invention to provide a very simple,inexpensive and effective packing element useful in devices such ashydraulic swivels.

Another object of this invention is to provide an arrangement andconstruction of parts whereby the packing of a swivel is lon cated atadvantageous points and is readily accessible. Y

The various objects and features of my invention will be best and morefully understood from the following detailed description of a typicalpreferred form of the invention throughout which description referenceis had to the accompanying drawings, in which:

Fig. 1 is a vertical detailed sectional view' of a swivel embodyingl thepresent invention, and

Fig. 2 is an enlarged sectional view of cer-A tain parts of the swivelembodying the present invention. v

This invention has particular reference to packing means and isparticularly applicable to hydraulic Vswivels such as are used in welldrilling rigs. I will therefore proceed with a description of theinvention applied to a hydraulic swivel designed particularly for useina well drilling rig.

The swivel shown in the drawings includes, generally, a main part, ortrunnion block 10, supporting means 11 for the trunnion block, a swivelstem 12 Vcarried by the trunnion block, a goose-neck 13 carriedby thetrunnion block, inner and outer wash pipes 14, and 1 5, respectively,and suitable packing means and other features, the details of which willbe hereinafter described.

The trunnion block 10 includes a cylindrical body 16, a bottom 17closing the lower end of the body and a cover 18 closing the upper endof the body. The bottom 17 is formed integral with the body, the cover18 being detachably secured to the body by cap bail 23.

serial No. 62,069.

screws 19. The supporting means 11 illustrated in the drawings includesa ring 2O which freely surrounds the body of the trunnion block and hasopenings at dia-metrically opposed sides which rotatably carry trunnions21 projecting from the sides of the body at diametrically oppositepoints. The ring 20, has trunnions 22 at diametrically opposite points,the axis of the trunnions 22 being at right angles to that of thetrunnions 21; the usual bail 23 is applied to the trunnions 22 in themanner shown in the drawings. l/V ith this construction the trunnionblock 10 is swivelly mounted within the The swivel stem 12 extends intothe body 16 of the trunnion block through the bottom 17 thereof andissupported by a suitable bearing 25 in the trunnion block. 'ifhe bottom17 has a part 26 extending downwardly around the swivel stem to carrypacking 28. The packing 28 is compressed by a compression ring 29screw-threaded to the part 26 in the manner shown in Fig. 1 of thedrawings. The bearing 25 through which the swivel stem is mounted in thetrunnion block may be a suitable anti-friction bearing, fork instance, aroller bearing, mounted in the body .16 between an enlargement or head29 on the swivel stem and the bottom 17'. The particular bearing shownin the drawings isa combination radial and thrustbearing.

The goose-neck 13 ismounted on a tubular or cylindrical carrier 30carried above the cover 18 on spaced supports 31. The gooseneck 13 maybe shaped and proportioned in the manner common to swivels and may beprovided with means, for instance, screw threads 82 whereby a suitablehose, or the like, may be connected to it. The gooseneck is iirmlymounted on the upper end of the part 30 through a suitable flangeconnection 33.

The inner wash pipe 1/1, extends or projects downwardly from thegoose-neck through the tubular part 30 while the outer wash pipe 15extends upwardlyV from the head 29 of the swivel stem through the cover18 and between the inner wash pipe and tubular part 80; the outer washpipe is connected, for instance, screw-threaded into the head 29 of theswivel stem so that it rotates with the swivel stem. The inner wash pipemay be screw-threaded into the goose-neck to be stationary therewith.The parts are arranged and proportioned so that there is a substantialspace between the outer wash pipe and tubular part 30 to carry packing40. A suitable packing compression ring 41 surrounds the outer wash pipeand screwthreads into the lower end of the tubular part 30 to compressthe packing 40.

ln the preferred construction the cover 18 is provided with a centralprojection 42 which surrounds the outer wash pipe to carry packing 44. Aring 45 surrounds the outer wash pipe and screw-threads into the cover18 or extension 4:2 to operate the packing 4'4. lVith this arrangementand construction the rings 41 and 45 which operate the packingsurrounding the wash pipe 15 are readily operable by means or toolsinserted between the space supports 31.

In accordance with myV present invention the inner wash pipe which isstationary, extends into the upper end of the outer wash pipe withworking clearance and a packing sleeve 5() is mounted on or carried bythe lower part of the inner wash pipe to pack the wash pipes so thatthere is no leakage of fluid between them. In the particular form of theinvention shown in the drawings the expansive packing is in the fornrofa tubular body of rubber the upper end of which extends into a socket orrecess 52 formed in the lower end of the inner wash pipe while the lowerend project-s freely from the inner wash pipe to engage the outer washpipe. rllhe upper end of the rubber sleeve may be held or retained inthe socket in the wash pipe 14 by a suitable clamping or retainingrii'ig 55 as clearly shown in Fig. 2 of the drawings. The surface of thering 55 which engages the rubber may be made irregular as shown in Fig.2 so that it is eifective in holding the rubber.' The retaining` ring 55may be held in place with reference to "the rubber and inner wash pipeby means of rivets 5G, or the like. The rubber sleeve preferably extendsfreely below the inner wash pipe Va substantial distance and is shapedvso that its outer 'surface has a working in the outer wash pipe, in thepreferred form, the 'sleeve decreases in thickness froin the wash pipe14, to its lower 'end ina-king its lower portion readily efpansible intopressure engagement with the outer wash pipe. lVhen the device is inoiie'ration, and, fluid under pressure 'is circulated through thegoose-neck and from the inner wash pipe to the outer wash pipe, thefiuid pressure operating on the inside of the packing sleeve expands itinto pressure engagenient with the outer wash pipe making a fluid-tightconnection between the two wash pipes.

VWith the arrangen'ient provided by my invention any fluid that doesleak past the packing sleeve 5() must also leak past the packing 14before it can escape. The packing sleeve 50 being carried by the innerwash pipe, and the inner wash pipe being carried by the goose-neck, thesleeve can be renewed or replaced upon removal of the goose-neck.

Having described only a typical preferred form of my invention lr do notwish to limit myself to the specific de ails set forth, but wish toreserve to myself any changes or variations that may appear to thoseskilled in the art and fall within the scope of the following claims.

Having described my invention, l claim:

1. ln a swivel connection two pipes one extending into the other and onerevolving relative to the other, and an expansible packing sleeveextending from the inner end of the inner pipe to engage the interior ofthe outer pipe.

2. ln a hydraulic swivel, a swivel stein, an outer wash pipe extendingupwardly from `he stein, a detachable goose neck, an inner wash pipecarried by and extending downwardly from the goose neck into the outerwash pipe, the inner and outer wash vpipes being adapted for relativerotation, and a packing' sleeve on the lower end of the inner wash pipeengaging the outer wash pipe.

in a hydraulic swivel two wash pipes adapted for relative rotation andone extending into the other, and a rubber packing sleeve extending fromthe inner end of the inner pipe to engage the interior of th'e outerpipe.

4. In a hydraulic swivel two wash pipes adapted for relative rotationand one entends ing into the other, the inner pipe having a socket inits inner end and an erqiiansible packing sleeve carried in the socketand pro jeeting from the end of the inner pipe.

5. In a hydraulic swivel two wash pipes adapted -for relative rotationand one extending into the other, and a rubber packing` sleeve extendingfrom the inner end of the inner pipe to engage the interior ofthe outerpipe, the sleeve decreasing in thickness from the pipe to its free` end.

In witness that l claim the foregoing 1 have hereunto subscribed my namethis 15th day of September, 1925.

nor TAYLOR.

llO

